Workflow template error with columns

Hi
I have a PDF template in my workflow that reads my columns, and i keep getting errors in my expressions:
“ErrorCode”: “ERROR_WORKFLOW_INVALID_EXPRESSION”,
“Description”: “Workflow rule ‘Correo inspección patrulla externa mantenimiento’ action ‘Correo incumplimientos mantenimiento inspección externa’ Attachment template. Expression ‘[29.Se observa limpieza y sin basura en áreas externas, así como palmeras podadas y sin maleza]’ is invalid due to: Unable to find column ‘29.Se observa limpieza y sin basura en áreas externas, así como palmeras podadas y sin maleza’.”,
I am sure that the column is exactly the same as my data!!

Try copying the field name from the Data > Columns pane directly into the workflow template.
Make sure you do not have a blank space at the start or end of the field name.
We compare the names exactly, so the slightest mismatch will result in the error you are seeing.